(3) \( -2\left\{-9-\left[6 \div 2-\frac{-9}{3}+\sqrt{16}-\frac{-8}{-2}\right]^{3}-(-6+5 \times 7)^{2}-3\right\}-1= \)

tinh \( a x^{2}+2 x+3 y=6 \)

a. \( \frac{2 x^{3}+6 x-6}{x^{3}-1} \)

Roger was told to think of a number, add 20 , then divide the result by 3 . The answer was Jower than Roger's original number. Deteruine the range of possible numbers Roger may have originally chosen.

Diketahui sistem persamaan tinier berikut ini : \[ \begin{array}{l}-1 x+y+2 z=2 \\ 3 x-1 y+z=6 \\ -1 x+3 y+4 z=4\end{array} \] Tentukan solusi persamaan linear tersebut menggunakan metode gauss!

8. \( \frac{\sqrt{27 a^{3} b^{6}}}{\sqrt{3 a b^{6}}-5 a b^{2}}= \)